100pcs 125KHz TK4100 EM4100 keyfobs RFID Tag Key Ring Proximity Token Access 11 Colors for RFID Tags Access control

BlackRedGreenGrayYellowBlueOrangeBlackish Green

If you choose "Mixed color", you will receive : 10 Blue, 10 Red, 10 Yellow, 10 Orange, 10 Gray, 10 Black, 10 Green, 10 Pink, 10 Purple, 10 Army green

Please note, TK4100 read-only and can not write. If you want to buy can rewrite the tags, you should buy EM4305 chip tags.

Please open the link to purchase EM4305 chip tags.

https://www.aliexpress.com/item/100pcs-Lot-EM4305-RFID-Tag-125Khz-Copy-Rewritable-Copy-Card-Rewrite-Duplicate-Keyfobs-Ring/32799271269.html